Pump for immersion within a fluid reservoir

ABSTRACT

A pump is provided for immersion in a fluid reservoir, such as a pit or lagoon containing liquid manure, from a position at an edge of the reservoir. The pump may be adapted for connection to a farm vehicle, such as a tractor, positioned at the edge of the reservoir. The pump comprises an extensible body, fluid conduit and drive means in order that a length of the pump may be varied in order to accommodate a variety of reservoir fluid heights. In addition, the pump may be pivotable relative to at least a portion of a frame in order that the entrance angle may be adjusted. The pump may comprise a housing with an inlet and an outlet, the outlet in fluid communication with the fluid conduit. An impeller within the housing may direct fluid from the inlet to the outlet in the housing.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/063,566, filed Mar. 8, 2016, which is a continuation of U.S. patentapplication Ser. No. 14/570,504, filed Dec. 15, 2014, now issued underU.S. Pat. No. 9,488,190 on Nov. 8, 2016, which is a continuation of U.S.patent application Ser. No. 13/038,189 filed Mar. 1, 2011, now issuedunder U.S. Pat. No. 8,944,758 on Feb. 3, 2015, the contents of all ofwhich are incorporated herein by reference.

FIELD OF THE INVENTION

The invention relates to pumps, particularly pumps that are positionablealongside a fluid reservoir for immersion within the reservoir. Inparticular, the invention relates to agricultural pumps for the pumpingof liquid manure from liquid manure reservoirs.

BACKGROUND

Liquid manure from animal husbandry operations, particularly pig farmingoperations, is typically stored in a large manure reservoir or lagoonuntil there is a sufficient quantity available to spread or irrigateonto farm land for disposal. In order to remove the manure from thereservoir, a pump is used that is typically located alongside thereservoir and lowered into the reservoir. The pump can be free standingor attached to a tractor, which is often preferable to provide stabilityto the pump and a source of motive power for the pump.

The volumetric flow rate of fluid handled by the pump is large,typically in excess of 4000 gal/min; accordingly, it is desirable thatthe pump be efficient in terms of providing the required flow withminimal energy loss. Efficient pumps permit use of smaller tractors forproviding motive power and reduce the fuel consumption of the tractor,reducing pump operating cost. In addition, it is desirable that the pumphave large fluid openings and generous tolerances in order that solidmaterial in the reservoir can be accommodated by the pump withoutplugging; this works against pump efficiency and makes it extraimportant to capitalize on efficiency gains wherever else they might beavailable.

Since the surface of the reservoir is variable in height relative to theside, due to either variation in the degree to which the reservoir isfilled or due to removal of manure from the reservoir by pumping, it isdesirable to have a pump with a variable depth position and optionallyorientation relative to the surface. This is commonly accomplished bylowering the entire pump towards the surface, which often requires thetractor to be positioned dangerously close to the edge of the reservoirand is not suitable for all situations, particularly lagoons withgradually sloped sides or reservoirs with elevated sides.

In addition, it is desirable to have some means of surface agitation,either separate from the pump or incorporated into the pump itself, todisrupt formation of a cake or blanket on the surface of the reservoirand/or to prevent foam formation during pumping. The means of agitationoften comprises a nozzle for re-directing a portion of the pumped fluidback to the surface of the reservoir; however, these nozzles aretypically fixed and lack the ability to be positioned to break up cakesand foam.

Accordingly, there still exists a need for improved pumps, particularlypumps that are positionable alongside a fluid reservoir for immersionwithin the reservoir.

SUMMARY OF THE INVENTION

According to an aspect of the invention, there is provided a pump forimmersion within a fluid reservoir comprising: a pump body comprising anelongated fluid conduit; a housing located at a bottom end of the pumpbody, the housing comprising a fluid inlet and at least two upwardlyoriented tangential fluid outlets located on opposite sides of the body;a combiner for creating a fluid connection between the outlets and thefluid conduit; an impeller located within the housing having vanesshaped to direct the fluid tangentially within the housing.

The pump desirably further comprises a frame that may be adapted formounting to a farm vehicle, particularly a tractor. The frame maycomprise means for mounting to a three point hitch connection of atractor, a type of connection that is well known in agriculture andpermits a frame to be raised or lowered relative to the tractor. Thepump body may be pivotable about at least a portion of the frame from asubstantially horizontal transport position to a non-horizontal (e.g.vertical) working position. The pump may further comprise a frameadjustment means for adjusting an angular relationship between the pumpbody and horizontal. This allows the pump to be presented to thereservoir surface with a variety of angular orientations.

The pump body and fluid conduit may be extensible along a longitudinalaxis of the pump in order to vary a length of the pump. This permitsfurther flexibility in terms of pump position relative to the reservoirsurface and allows the pump housing to be extended downwardly towardsthe surface as the reservoir is emptied. The pump may comprise a drivemeans for delivering motive power from a motive power source (such as anengine located, for example, on the tractor), to the impeller of thepump. The drive means may be adapted for adjustment with the pump bodyalong the longitudinal axis. The drive means may comprise a hydraulicfluid conduit for providing hydraulic fluid power to a hydraulic motorconnected to the impeller or, preferably, a Power Take-Off (PTO) shaftthat is extensible with the pump body and fluid conduit. The pump body,fluid conduit, and drive means may comprise telescoping connections topermit variation in length.

The housing desirably improves efficiency of the pump by directing thefluid not just tangentially of the housing, but also upwardly. Thiseliminates the need for elbows to direct the fluid upwardly, which leadto pressure drop and efficiency loss. The outlets desirably direct thefluid upwardly from the housing at an angle of from 20 to 70 degreesrelative to a plane of rotation of the impeller, more desirably at anangle of from 30 to 60 degrees, yet more desirably at an angle of from40 to 50 degrees. The at least two outlets may comprise at least threeoutlets or at least four outlets. The at least two outlets may comprise,two outlets, three outlets or four outlets. The outlets may be evenlyspaced about the circumference of the housing.

In order to impart the desired direction to the fluid as it leaves thehousing and to reduce the amount of energy robbing directional changerequired, it is desirable that the vanes of the impeller are configuredto direct the fluid both tangentially and upwardly, relative to theplane of rotation of the impeller, within the housing. This can beaccomplished by providing the vanes with a curved side profile, suchthat rotation of the impeller causes the fluid to follow the curvatureof the vane and directs the fluid tangentially to the direction ofrotation and upwardly along the vane. This desirably causes the fluid toexit through the outlets in a direction substantially parallel to theoutlets, reducing the need for directional change to be imparted to thefluid by the housing and thereby increasing the efficiency of the pump.In addition, use of multiple outlets reduces the pressure dropexperienced by the fluid as it exits the pump, further improving pumpefficiency and reducing the likelihood of blockage of the outlet due toany solid debris that may be present in the fluid being pumped.

The pump is desirably equipped with a bottom inlet located substantiallyin the center of the impeller. Although multiple inlet openings may beused, it is desirable that a singled inlet opening is used with a largeenough diameter to permit debris to pass through the pump withoutplugging the inlet. The inlet diameter is desirably at least one thirdof the diameter of the pump housing, more desirably at least half of thediameter of the pump housing. By locating the inlet in the bottom of thehousing, a relative shallower amount of fluid is required for pumping,permitting more complete drainage of the reservoir being pumped.

The combiner desirably directs fluid from the outlets upwardly along thebody and towards a bottom end of the fluid conduit. The combinerdesirably uses gradual bends to reduce the likelihood of pressure lossof the fluid, thereby improving overall pump efficiency. The combiner isdesirably located between the housing and the bottom end of the fluidconduit, but can also be located elsewhere, for example near a top ofthe pump. In this case, it is desirable that flexible fluid conduits areemployed in order to accommodate length variation of the pump body.

The pump may further comprise an agitator nozzle for directing a portionof the fluid passing through the pump outwardly from the pump and backtowards a surface of the fluid reservoir. This desirably permitsdisruption of cake, blanket or foam formation on the surface of thereservoir. The agitator nozzle is desirably in fluid communication withthe fluid conduit. The agitator nozzle may be connected to the fluidconduit by a rotatable nozzle body that permits rotation of the nozzleabout the longitudinal axis. The pump may further comprise a nozzleorientation means for adjusting an angular relationship between thelongitudinal axis and the nozzle. The nozzle orientation means may bemounted to the rotatable nozzle body. By permitting rotation and angularadjustment relative to the longitudinal axis, fluid exiting the nozzlecan be directed towards any desired location on the surface of thereservoir, simplifying the task of disrupting cakes, blankets or foam onthe surface. A flexible connection may be provided between the nozzleand the rotatable nozzle body.

According to another aspect of the invention, there is provided a pumpfor immersion within a fluid reservoir, the pump comprising: a frame; atelescoping pump body connected to the frame, the body comprising atelescoping fluid conduit, the body and conduit extensible along alongitudinal axis; a frame adjustment means for pivoting the telescopingpump body from a substantially horizontal transport position to anon-horizontal working position; a housing located at a bottom of thepump body comprising a bottom fluid inlet and at least two upwardlyoriented tangential fluid outlets located on opposite sides of the body;a combiner for creating a fluid connection between the outlets and thetelescoping fluid conduit, the combiner directing fluid from the outletsupwardly along the body and towards a bottom end of the fluid conduit;an impeller located within the housing having vanes shaped to direct thefluid tangentially and upwardly within the housing; a drive means forproviding power to the impeller, the drive means extensible with thetelescoping pump body; an agitator nozzle for directing a portion of thefluid outwardly from the pump back to a surface of the fluid reservoir,the agitator nozzle rotatable about the longitudinal axis; and, a nozzleorientation means for adjusting an exit trajectory of the nozzle.

According to yet another aspect of the present invention, there isprovided a pump comprising an elongated fluid conduit aligned with alongitudinal axis of the pump; a housing at a bottom of the conduitcontaining an impeller for directing fluid through the conduit; anagitator nozzle in fluid communication with the conduit; and, a nozzleorientation means for adjusting an exit trajectory of the nozzle.

Although described herein with reference to the pumping of liquidmanure, the pump according to the present invention can be employed inany fluid pumping situation, particularly where reservoirs with variableheight are encountered, such as when pumping fluid from rivers, ponds,lakes, rain water storage reservoirs, etc.

BRIEF DESCRIPTION OF THE DRAWINGS

Having summarized the invention, preferred embodiments thereof will nowbe described with reference to the accompanying figures, in which:

FIG. 1 shows a perspective view of a pump according to the invention ina transport position;

FIG. 2 shows a right side cut-away view of the pump of FIG. 1 in aworking position;

FIG. 3a shows a left side cut-away view of the pump of FIG. 1 in aworking position;

FIG. 3b shows a left side cut-away view of the pump of FIG. 1 in anextended working position;

FIG. 4a shows a side view of a pump housing according to the invention;

FIG. 4b shows a sectional view of the pump housing of FIG. 4 a;

FIG. 5 shows an impeller of a pump according to the invention;

FIG. 6 shows an embodiment of a nozzle orientation means according tothe invention in a first position;

FIG. 7 shows the nozzle orientation means of FIG. 6 in a secondposition;

FIG. 8 shows the nozzle orientation means of FIG. 6 in a third position;

FIG. 9 shows a perspective view of another embodiment of a pumpaccording to the invention having two fluid outlets;

FIG. 10 shows a perspective view of yet another embodiment of a pumpaccording to the invention having four fluid outlets; and,

FIG. 11 shows a perspective view of yet another embodiment of a pumpaccording to the invention, having an alternative nozzle orientationmeans.

DETAILED DESCRIPTION

Referring to FIG. 1, an embodiment of a pump according to the presentinvention is shown comprising a pump body 1 and an elongated fluidconduit 2 with a centrally located longitudinal axis 11. A pump housing3 is mounted to a bottom end of the pump body and comprises a fluidinlet 4 located on a bottom thereof and three upwardly orientedtangential fluid outlets 5 a, 5 b, 5 c evenly spaced about thecircumference of the housing 3 for directing fluid upwardly along thebody 1. The outlets 5 a, 5 b, 5 c are connected to outlet conduits 6 a,6 b, 6 c that are in turn connected to a fluid combiner 7. The combiner7 directs the flow from the outlet conduits 6 a, 6 b into the elongatedfluid conduit 2, where it moves upwardly towards the conduit outlet 8. Aflow control valve 36, comprising a hydraulically actuated gate valve,is flange mounted at the outlet 8. Fluid exiting the outlet 8 can bedelivered to rigid or flexible conduit, depending on what is best suitedto the application, attached to the pump via outlet connector 37.

Turning additionally to FIGS. 6 through 8, the fluid conduit 2 comprisesa nozzle body 110 that is connected to an agitator nozzle 109, both ofwhich are movable via a nozzle orientation means 113. The nozzle body110 comprises a section of the fluid conduit 2 that is rotatable about alongitudinal axis 11 by way of engagement between a nozzle sun gear 118and a nozzle moon gear 119 that is actuated by a hydraulic motor 120.Suitable seals, such as O-rings, are provided to maintain a fluid sealbetween the combiner 7 and the upper portion of the fluid conduit 2,despite the rotational movement of the nozzle body 110. The nozzle body110 comprises a T-shaped portion 121 to which a nozzle gate valve 122 isflange mounted. The nozzle gate valve 122 is hydraulically actuated andcan be adjusted in order to provide a means for controlling the fluidflow rate through the nozzle 109. A second sun gear 123 is engaged witha second moon gear 124 that is actuated by a second hydraulic motor 125.Rotation of the motor 125 causes the nozzle 109 to rotate about an axisperpendicular to the longitudinal axis 11. The nozzle 109 is equippedwith a fixed 45° elbow 126. By selecting a desired combination ofrotation of the nozzle sun gear 118 and the second sun gear 123, a widerange of fluid exit trajectories can be obtained from the nozzle 109. Anumber of potential trajectories are illustrated with reference to FIGS.6-8. This allows a stream of the fluid being pumped to exit the pump andbe re-directed back to the surface of the fluid reservoir in order toprovide agitation and to break-up any solid clumps of debris or foamthat may have accumulated at the surface.

Returning now to FIG. 1, the pump further comprises a frame 19 thatcomprises a first portion 19 a pivotally connected to a second portion19 b via a frame pivot shaft 20. The first portion 19 a is attached tothe pump body 1. A frame adjustment means is provided for adjusting anangular relationship of the pump body relative to horizontal. The frameadjustment means comprises a pair of frame dogs 21 a, 21 b that areattached to the first frame portion 19 a proximal the pivot shaft 20.The frame dogs 21 a, 21 b are interconnected with a pair of pivotcylinders 22 a, 22 b mounted to pivot lugs 23 a, 23 b of the secondportion 19 b. Actuation of the cylinders 22 a, 22 b causes the firstportion 19 a to rotate about the pivot shaft 20 relative to the secondportion 19 b in order to change the angular orientation of the pump body1 from a substantially horizontal transport position, as shown in FIG.1, to a non-horizontal working position, for example a vertical workingposition as shown in FIGS. 2 and 3 a, 3 b. This allows the pump body tobe positioned at any desired angle relative to the surface of the fluidreservoir, in order to accommodate a variety of reservoir edgeconditions and surface heights.

In one embodiment, the frame 19 is adapted for connection to a farmtractor; however, in other embodiments, the frame may be adapted forconnection to a truck or other vehicle. The frame 19 shown is adaptedfor connection to the farm tractor by a three-point hitch mechanism thatis well known in the art; however, in other embodiments, the frame maybe wheeled or otherwise mounted for independent connection to the farmtractor in order that it may be readily disconnected from the tractorand left in a desired location. Various means of connecting the pump tothe farm tractor are known to persons skilled in the art.

The pump housing comprises a bottom rest 24 attached to a bottomthereof. The bottom rest is used to support the base of the pump againsta bottom of the fluid reservoir and prevents damage to the housing whenthe pump is set down when not in use. The bottom rest 24 also provides aminimum spacing between the bottom of the fluid reservoir and the inlet4. An access door 25 is provided proximal the bottom of the pump body 1.The access door is used to connect or dis-connect a pump drive means(not shown in FIG. 1) from a pump impeller 26 located within the housing3, in a manner that will be further described hereinafter.

Referring to FIG. 2, the pump is shown in a substantially verticalworking position. The frame cylinders 22 b (22 a not shown) are extendedsuch that the first portion 19 a of the frame and the pump body 1 arepivoted downwardly relative to the second portion 19 b. The bottom rest24 is positioned against the bottom of the fluid reservoir 27, ensuringthat the housing 3 is not damaged and keeping a certain minimum spacingbetween the bottom of the reservoir 27 and the pump inlet 4 in thebottom of the housing. A cutaway portion of the body 1 shows a pumpdrive means comprising a rigid Power Take-Off (PTO) shaft 28 that isconnected to the tractor via a PTO connector 29. A flexible knuckle (notshown) behind the connector allows the rotation of the PTO connector 29to be translated down the shaft 28 to the impeller 26. The access door25 is used to detach the shaft 28 from the impeller for maintenancepurposes. The shaft 28 is of a telescoping type that permits its lengthto be adjusted with changes in length of the pump body 1.

Referring to FIGS. 3a and 3b , in FIG. 3a the cutaway portion of thebody 1 shows a hydraulic body cylinder 30 in a retracted position. Thebody cylinder 30 may be extended, as shown in FIG. 3b , along thelongitudinal axis 11 to change the length of the pump body 1, the fluidconduit 2 and the PTO shaft (28, not shown in FIGS. 3a and 3b ), whichare all telescopic. This allows the depth of the pump to be increased inthe event that the fluid reservoir 27 is deeper, as shown in FIG. 3b .By accommodating variable depth and variable entrance angle (byadjustment of the angle between the first portion 19 a of the framerelative to the second portion 19 b) a variety of different types ofreservoir edge conditions and depths can be accommodated.

Referring to FIG. 4a , the housing 3 is shown in greater detail. Theoutlets 5 a, 5 b, 5 c are tangential to the radius of the housing andare also angled upwardly, relative to when the housing is in a workingposition. In conventional pump housings, fluid exits tangentially and isthen required to execute a 90° bend; by providing an upward angle to thetangential housing, a more gradual transition is created, resulting inless fluid pressure loss. Referring additionally to FIG. 4b , it canalso be seen that providing the upward angle to the tangential outlets 5a, 5 b, 5 c results in a much larger opening area, denoted as 5 a′, 5b′, 5 c′ within the housing. This opening area 5 a′, 5 b′, 5 c′eventually constricts down to the diameter of the outlet conduits 6 a, 6b, 6 c. However, by providing a larger opening area within the housingand gradually transitioning to a smaller opening area, fluid pressuredrop is reduced. The tangential fluid outlets 5 a′, 5 b′, 5 c′ thereforeallow higher flow rates for a given power input due to the upward angle,which makes the upward turn more gradual and creates a larger openingwithin the housing that gradually transitions to the outlet connectordiameter. The impeller 26 is also shown.

For manure pumping applications, in particular, it is known that fluidconduits and pump outlets having diameters of less than about 5″ areprone to plugging with debris. It is important to provide a certainminimum outlet area in order to reduce pump pressure drop and energyloss for a given flow rate. It has been found that use of multiplesmaller outlets allows the desired minimum outlet area to be provided,while advantageously allowing the impeller size to be reduced ascompared with a single opening. This leads to a reduction in the powerrequired to provide a certain flow rate. An alternative approach is toprovide a larger or similar sized impeller as would be used with asingle outlet opening and realize an increased flow rate through thepump at a given power input. The multiple outlet configuration therebyco-operates with the impeller design to provide a number of potentialbenefits, according to the application requirements.

Referring additionally to FIG. 5, the impeller 26 is shown in greaterdetail. It can be seen that each of the vanes 31 comprises a flatportion 32, perpendicular to the direction of rotation of the impeller26 (clockwise about the center 33), and a curved portion 34 that iscurved forwardly in the direction of travel. The area of the curvedportion 34 and thus the degree of curvature increases progressively withdistance from the center 33 of the impeller. This has the effect ofdirecting the fluid both tangentially and upwardly, towards the upwardlyangled outlets 5 a, 5 b, 5 c. Since the fluid is already being directedupwardly by the impeller 26, the result is less fluid pressure loss uponentering the outlets 5 a, 5 b, 5 c than would otherwise occur if adirectional change were induced solely due to friction between the fluidand the housing 3. The forwardly curved vane portion 34 thereforeco-operates synergistically with the housing, specifically the upwardlyangled tangential outlets 5 a, 5 b, 5 c, to reduce pressure loss andtherefore provide a greater flow rate for a given power input than wouldotherwise be obtained.

Returning briefly to FIG. 1, due to the enhanced flow rate provided bythe design of the housing 3 and impeller 26, the pump inlet 4 in thebottom of the housing is preferably provided as a single central openinghaving a diameter that is at least a third of the diameter of thehousing, more preferably at least half the diameter of the housing. Thisover-sized pump inlet allows the desirable high fluid flow rate to passthrough the pump without internal cavitation. Resuming with FIGS. 4-5,in order to prevent pump inefficiency due to fluid short circuiting atthe center of the impeller 26, the lower edge of each vane 31 isequipped with a blocking plate 35 that is perpendicular to the flatportion 32. The plate 35 has a curved edge and increases in area towardsthe center 33 of the impeller 26. The blocking plate 35 has the effectof occluding some of the area of the inlet 4 near the center 33 toprevent short-circuiting of fluid between the vanes 31 due to the largearea of the inlet 4. This illustrates yet another manner in which thedesign of the impeller 26 co-operates with the design of the housing 3to improve pump performance.

Referring to FIG. 9, a pump according to the invention is shown that issimilar in most respects to the pump described with reference to FIGS.1-8, with features denoted by like reference numerals. However, thehousing 103 has two fluid outlets 105 a, 105 b. The fluid outlets 105 a,105 b are connected to two connectors 106 a, 106 b that meet at asubstantially Y-shaped combiner 107. The function and operation of theremaining components are otherwise similar.

Referring to FIG. 10, a pump according to the invention is shown that issimilar in most respects to the pump described with reference to FIGS.1-8, with features denoted by like reference numerals. However, thehousing 203 has four fluid outlets 205 a, 205 b, 205 c, 205 d. The fluidoutlets 205 a, 205 b, 205 c, 205 d are connected to four connectors 206a, 206 b, 206 c, 206 d that meet at a combiner 207. The function andoperation of the remaining components are otherwise similar.

Referring to FIG. 11, a pump as described with reference to FIG. 9 isshown. However, the fluid conduit 2 comprises a nozzle body 10 to whichis connected an agitator nozzle 9. The nozzle body 10 provides a fluidconnection between the fluid conduit 2 and the nozzle 9 via a flexibleconnector 12. The flexible connector 12 may be made from, for example,an elastomeric material. The flexible connector 12 allows the angularorientation of the nozzle 9 to be adjusted relative to the longitudinalaxis 11.

A nozzle orientation means 13 is provided for effecting this adjustmentin orientation. In the embodiment shown, the orientation means 13comprises a pair of C-shaped linkages 14 a, 14 b located on either sideof the nozzle 9 and connecting the nozzle 9 to the nozzle body 10. TheC-shaped linkages 14 a, 14 b are each actuated by a pair of hydrauliclinkage cylinders 15 a, 15 b. Each C-shaped linkage pivots in the middleupon actuation of the cylinders to open or close, thereby adjusting theangular orientation of the nozzle 9 relative to the pump body. However,due to limitations in the stroke of the linkage cylinders 15 a, 15 b,the orientation means also comprises an orientation cylinder 16interconnected by orientation linkages 17 a and 17 b with one of theC-shaped linkages 14 a and the nozzle body 10. The orientation cylinder16 permits larger macro adjustments to be made to the orientation of thenozzle 9, whereas the smaller linkage cylinders 15 a, 15 b permit fineadjustments to be made.

The nozzle body 10, and therefore the nozzle 9, are rotatable about thelongitudinal axis 11. The nozzle body 10 includes sealing means, such asO-rings, to prevent fluid leakage at the site of rotation. The nozzlebody comprises a nozzle sun gear 18, which is engaged by a nozzle moongear (not shown in FIG. 11) that is driven by a hydraulic motor (notshown in FIG. 11). Activation of the motor in a clockwise orcounter-clockwise direction causes an opposite rotation of the sun gear18 and the nozzle body 10. By adjustment of both the rotation of thenozzle body 10 about the longitudinal axis 11 and the angularorientation of the nozzle 9, any desired orientation of the nozzle maybe created relative to the pump.

The foregoing describes preferred embodiments of the invention and isnot meant to be construed in a limiting sense. Persons skilled in theart will readily appreciate other variants and mechanical equivalentsthat may achieve the objects and advantages of the present inventionwithout departing from the scope of the accompanying claims.

The invention claimed is:
 1. A pump comprising: an extensible pump body;an elongated fluid conduit extensible along a longitudinal axis of thefluid conduit; a drive means extensible parallel to the longitudinalaxis; a hydraulic cylinder configured to extend parallel to thelongitudinal axis to change a length of the pump body, the fluid conduitand the drive means; a housing located at a bottom end of the pump body,the housing comprising a fluid inlet and a fluid outlet, the fluidoutlet in fluid communication with the fluid conduit; an impellerconnected to the drive means and located within the housing to directfluid from the inlet to the outlet in the housing; and, an agitatornozzle in fluid connection with the conduit for directing a portion ofthe fluid in the conduit outwardly from the pump with means forcontrolling a fluid flow rate through the nozzle, wherein the extensiblepump body supports the hydraulic cylinder and wherein the hydrauliccylinder is operable to extend or retract the extensible pump body. 2.The pump according to claim 1, wherein the agitator nozzle is connectedto the fluid conduit by a movable nozzle body.
 3. The pump according toclaim 2, wherein the nozzle body comprises the means for controlling thefluid flow rate through the nozzle.
 4. The pump according to claim 1,wherein the pump further comprises a nozzle orientation means foradjusting an exit trajectory of the nozzle.
 5. A pump comprising: anextensible pump body; an elongated telescoping fluid conduit extensiblealong a longitudinal axis of the fluid conduit; a drive means extensibleparallel to the longitudinal axis; a housing located at a bottom end ofthe pump body, the housing comprising a fluid inlet and a fluid outlet,the fluid outlet in fluid communication with the fluid conduit; animpeller connected to the drive means and located within the housing todirect the fluid from the inlet to the outlet in the housing; and, anagitator nozzle in fluid connection with the conduit for directing aportion of the fluid in the conduit outwardly from the pump, the pumpcomprising means for controlling a fluid flow rate through the nozzle,wherein the extensible pump body is configured to support a hydrauliccylinder and wherein the hydraulic cylinder is operable to extend orretract the extensible pump body.
 6. The pump according to claim 5,wherein the fluid conduit has telescoping connections to permitvariation in the length.
 7. The pump according to claim 5, wherein thehydraulic cylinder is configured to extend parallel to the longitudinalaxis to telescope the fluid conduit and the drive shaft.
 8. The pumpaccording to claim 5, wherein the pump body is telescoping.
 9. The pumpaccording to claim 5, wherein the drive means is telescoping.
 10. Thepump according to claim 9, wherein the drive means is a drive shaft.